Refactor readers for better di (#457)

* Refactor readers to get a proper DI

Similar to what was done with writers, readers also needed to be updated to match the new way of doing things.
This commits promotes a better DI (factories, injection through constructors).

* Escapers should not be singletons

Instead, they should be proper object that can be injected where needed.

src/Spout/Writer/CSV/Manager/OptionsManager.php

@@ -3,7 +3,7 @@
 namespace Box\Spout\Writer\CSV\Manager;
 
 use Box\Spout\Writer\Common\Entity\Options;
-use Box\Spout\Writer\Common\Manager\OptionsManagerAbstract;
+use Box\Spout\Common\Manager\OptionsManagerAbstract;
 
 /**
  * Class OptionsManager
@@ -34,4 +34,4 @@ class OptionsManager extends OptionsManagerAbstract
         $this->setOption(Options::FIELD_ENCLOSURE, '"');
         $this->setOption(Options::SHOULD_ADD_BOM, true);
     }
-}
+}